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Morphological investigation and description of two new Gomphonema Ehrenberg (Bacillariophyta) species from India and Vietnam with biogeographical comments
Pardhi, S.; Vigneshwaran, A.; Kociolek, J.P.; Glushchenko, A.; Kulikovskiy, M.; Karthick, B. (2020). Morphological investigation and description of two new Gomphonema Ehrenberg (Bacillariophyta) species from India and Vietnam with biogeographical comments. Phytotaxa 468(2): 175-189. https://dx.doi.org/10.11646/phytotaxa.468.2.2
In: Phytotaxa. Magnolia Press: Auckland. ISSN 1179-3155; e-ISSN 1179-3163
Peer reviewed article  
Available in  Authors 
Keywords
    Algae
    Bacillariophyceae [WoRMS]; Gomphonema C.G. Ehrenberg, 1832 [WoRMS]
    Fresh water
Author keywords
    Diatoms, freshwater, new species, Gomphonema, taxonomy, Bacillariophyceae, biogeography, Algae
Authors  Top 
  • Pardhi, S.
  • Vigneshwaran, A.
  • Kociolek, J.P.
  • Glushchenko, A.
  • Kulikovskiy, M., more
  • Karthick, B., more
Abstract
    Two new species of Gomphonema Ehrenberg are described based on light and scanning electron microscopical observations. These are Gomphonema kallarense sp. nov. found in India and G. kezlyae sp. nov. found in India and Vietnam. We also report and document the morphology and variability of G. doonense from Vietnam, a species previously described from India based on a limited number of valves. Both G. doonense and G. kallarense have striae composed of doubly-punctate striae that are without occlusions, while G. kezlyae has striae with single rows of areolae that have external occlusions giving the impression of C-shaped openings. Our investigation shows that India and Vietnam share some species in common, adding additional evidence that the biogeography of freshwater diatoms from the tropics warrants future investigation.
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